WO2009106478A1

WO2009106478A1 - Transportable paint spraying device

Info

Publication number: WO2009106478A1
Application number: PCT/EP2009/052004
Authority: WO
Inventors: Nuray Tekogul; Joerg Albrecht; Christoph Cramer
Original assignee: Robert Bosch Gmbh
Priority date: 2008-02-25
Filing date: 2009-02-20
Publication date: 2009-09-03
Also published as: EP2257382A1; RU2491997C2; CN101959611B; EP2257382B1; CN101959611A; RU2010139293A; DE102008000400A1

Abstract

A transportable paint spraying device has, in a housing (2), an electric pressure-generating unit (27) for generating an airstream which is to be fed into an air hose (3) which can be coupled to the housing and to which a spray unit (6) can be connected. A cable drum (20) for a power cable (24) of the electric pressure-generating unit and a hose drum (11) for the air hose are arranged on the outside of the housing, wherein the cable drum and the hose drum are arranged parallel to one another and are separated from one another by means of a radial separating wall (12).

Description

title

Transportable paint sprayer

The invention relates to a transportable

Paint spraying device according to the preamble of claim 1.

State of the art

Are known transportable paint spraying equipment for spraying solvent-based and water-dilutable sprayed such as paints, glazes, primers, stains and wood preservatives. Such paint spraying devices have in a housing an electric drive motor which drives a centrifugal compressor as a blower, via which a pressurized air flow can be generated, which is guided via an air hose to a paint container and to the spray gun of the paint spraying device. The paint spraying device is transportable and has fastening straps on which the device can be worn.

Disclosure of the invention

The invention has for its object to improve the handling of a portable paint spraying device. These

The object is achieved with the features of the independent claims. The dependent claims indicate expedient developments.

According to a first aspect of the invention, the portable paint spraying device on the outside of the housing to a cable drum for a power cable for the power supply to electric pressure generating unit and a hose reel for the air hose, which is needed to produce the paint spray. Through the air hose, an air flow is directed to a paint container and further to an injection unit, in particular a spray gun, from which the color emerges in the form of a spray. According to the invention, it is provided that the cable drum and the hose drum are arranged parallel to one another and separated from each other by a radial partition wall.

This embodiment has the advantage that both the cable drum and the hose reel are part of the housing and can be arranged with simple measures on the housing or formed as part of the housing. The parallel arrangement of drums with intermediate bulkhead allows parallel, independent coiling of the power cord and air hose, the partition providing a clear association of the particular cable or hose with the associated drum and preventing inadvertent miswinding on the adjacent drum. In addition, one obtains in this way an attractive design of the device, since the separating partition in the manner of a plane of symmetry divides the outside of the housing into a left and a right drum. The diameter of the drums can be the same size, but in principle is also possible a different diameter, in particular a larger diameter of the hose drum to account for the lower flexibility of the air hose compared to the power cord. In addition, it is expedient, seen in the axial direction, the hose drum form with a greater width than the

Cable reel to account for the larger hose diameter of the air hose.

Advantageously, the cable drum, preferably also the hose drum is formed integrally with the housing of the paint spraying device. In addition to a simplified version, this also gives a visually appealing design in which a compact, self-contained impression is achieved. Nevertheless, it is basically possible to design the hose reel and / or the cable reel as a separate component, which is arranged on the outside of the housing and is connected to the housing by means of appropriate fastening measures. In particular, in the case of a rotatable embodiment of the cable drum, which is preferably combined with an automatic winding device, it is necessary to store the cable drum rotating on the housing, and optionally provided with the automatic winding device.

On the other hand, the embodiment of the cable drum formed integrally with the housing without the possibility of relative movement offers the advantage of greater designeric freedom.

Advantageously, both the hose reel and the cable drum each have an outwardly located, to the partition axially spaced boundary wall which limits the respective winding area on each drum to the outside. Inwardly, the winding area on each drum is limited by the common partition wall. This advantageously extends beyond the cable drum and the hose drum including the respective boundary wall in the radial direction at least over a limited angle segment and is thereby optically highlighted. In addition, the partition can be used for additional functions, for example by a handle is formed on the partition. Due to the radially higher version of the partition of the handle can be taken in an ergonomically favorable manner by the operator.

The drums are preferably arranged coaxially to each other and thus have the same longitudinal or drum axis, whereby a symmetrical impression is conveyed from an optical point of view. But it is also conceivable to arrange the drums eccentrically to each other, so that the respective drum axes are parallel and spaced apart. - A -

For the connection of the air hose to the pressure generating unit, a connecting piece is expediently provided, which advantageously branches off from the winding region of the hose reel. This connecting piece is advantageously L-shaped and has a tangentially extending to the winding portion legs, which serves to connect the air hose, and a radially leading into the housing leg for connection to the pressure generating unit. The position of the connecting piece in the circumferential direction is basically arbitrary, in question comes, for example, a top or bottom position, in each case based on the regular position of the paint spraying device.

According to a further aspect of the invention, a latch associated with the cable drum is adjustably held on the housing, which can be adjusted between a locking position and an open position, wherein in the locking position, the latch at least partially spans the winding area of the cable drum. The bolt is used to secure the air hose after winding on the cable drum and prevents inadvertent release of the hose, so that, for example, the transport of the device is simplified. The latch can be easily adjusted in a manual manner between the locking and the opening position. According to an advantageous embodiment, it is provided that the latch is pivotally held on the housing, for example via a hinge or other joint, and can be pivoted on the joint between the locking and opening position.

As an additional function, the bolt may have a receiving device which serves to receive the injection unit in the non-operational phases. The receiving device is designed according to a simple design as a recess in the bolt, which serves for suspending the injection unit. According to a further advantageous embodiment, it is provided that the latch is U-shaped, wherein the free end face of the bolt, that engages in the pivotable embodiment, the side facing away from the hinge, in the locking position in an associated recess in the housing. In order to fix the latch in its locking position, a corresponding fixing device may be provided on the housing, which fixes the latch. For example, a possible

Snap device, which consists of an undercut, in which the latch snaps in the locked position, wherein the latch is to be released by applying force from the locking position.

According to a further advantageous embodiment, the housing has a narrow design, in particular with the dimensions

1: 1: max. 0.5 relative to the ratio of height: width: depth.

The device can also be advantageously used as a stand-alone device, wherein rollers can be provided on the device for ergonomic handling. These rollers are preferably located in a common plane, so that, for example, in the case of three roles, the exposed roller side of all roles can rest on the floor. Conveniently, there are two rollers on the underside of the housing and another roller on a side wall at a distance from the bottom, allowing both a movement on the two rollers at the bottom in the upright position of the housing and a movement on the rollers in the event in that the device lies on the floor with the relevant side of the housing.

Further advantages and expedient embodiments can be taken from the further claims, the description of the figures and the drawings. Show it:

Fig. 1 is a perspective view of a portable paint spraying device, with an air hose to which a Paint container and a spray gun are arranged, shown in the inoperative state with a hinged on a bolt spray gun,

2 shows the paint sprayer in an inoperative position with the air hose in the wound state on a hose reel, which is formed on the outer circumference of the housing, with the bolt for securing the air hose on the drum in the locked state,

Fig. 3, the paint sprayer with open latch for

Unwinding the air hose from the hose reel,

4 is a side view of the paint sprayer with marked rollers on which the paint sprayer can be moved on the ground,

5 is a first side view of a paint spraying device with connection piece in the region of the hose drum for

Connection of the air hose,

6 is a second side view of the paint spraying device,

Fig. 7 is a sectional view through the area of a cable drum for receiving a power cable.

In the figures, the same components are provided with the same reference numerals.

The illustrated paint spraying device is a power tool for spraying solvent-containing and water-dilutable sprayed material, for example for paints, glazes, primers, stains or wood preservatives. In the paint spraying device, a low-pressure spraying method (HVLP) is applied, in which the color with a low pressure of about 0.2 bar to 0.5 bar and a high air volume at the same time> 200 Liters per minute is sprayed, preferably with a flow time less than 30 seconds. The method is particularly suitable for spraying paints on predominantly small areas. It arises during the injection process, only a slight overspray, so that due to the low

Spray loss even a use in closed spaces is possible. Coating degrees of up to 65% are achieved with the described HVLP process. Characteristic of the process is the air surrounding the spray material, which reduces an overspray and a color fog, resulting in advantages in terms of paint savings and lower solvent emissions.

The paint spraying device is a portable device that can be used in a portable manner with the aid of carrying straps.

The device can also be stably parked on the ground.

As can be seen in particular from FIG. 1, the paint spraying device 1 comprises a device housing 2 for accommodating an electrical pressure generating unit, in particular an electric drive motor, which drives a fan for generating an air flow, which can be introduced into an air hose 3. The air hose 3 is formed flexible and connected at one end via a coupling part 4 to the housing 2 to be supplied with the air flow, and the other end via another coupling part 5 with a spray gun 6, which is associated with a paint container 7. The coupling parts 4 and 5 at the ends of the air hose are expediently designed as quick-release coupling parts, so that in a simple and fast manner a respective release from the connection to the housing or to the spray gun and a corresponding connection can be performed. Formed on the housing are two feet 8, which allow a safe parking of the portable paint spraying device 1 on the ground. Furthermore, a fastening part 9 is arranged on the housing 2, to which a carrying belt 10 can be attached. On the outside of the housing is a hose reel 11, which is formed fixedly or integrally with the housing, and serves to receive the air hose 3 in the inoperative position. The winding region of the hose reel is delimited on one axial side by a radially projecting partition wall 12, which is provided with a handle 13 at its point diametrically opposite the feet 8. On the side axially spaced from the dividing wall 12, the hose drum 11 is delimited by a boundary wall 14, which likewise projects radially beyond the winding area of the drum but has a smaller diameter than the dividing wall 12. The winding region of the hose drum, the boundary wall 14 and the partition wall 12 are each formed integrally with the housing.

Furthermore, a latch 15 is arranged on the outside of the housing 2, which spans the winding area of the hose reel 11 in the axial direction. The latch 15 is movable, in particular pivotally held on the housing and between the locking position shown in FIG. 1, in which the

Winding area is spanned, and to adjust an opening position in which the winding area is released, so that the air hose 3 can be wound up or unwound. In the locked position, however, a wound air hose is securely held on the hose reel 11, so that the air hose can not accidentally come off the hose reel.

In addition, a receiving device for receiving the spray gun 6 is provided on the bolt 15, so that these, as shown in Fig. 1, can be suspended in the inoperative position of the paint spraying device.

2 and 3, the latch 15 is shown on the one hand in the locking position (FIG. 2) and on the other hand in the open position (FIG. 3). The bolt 15 is U-shaped, wherein the free end face of the bolt 15, as shown in FIG. 3, a tab 16 forms, which engages in the locking position in a recess or recess 17 on the housing 2. In the open position, the latch 15 is pivoted about a hinge 18, the tab 16 is removed from the recess 17 on the side wall of the housing 2, so that the air hose 3, which is wound on the hose reel 11, can be removed from this , In contrast, in the locking position of the bolt 15 according to FIG. 2, the air hose 3 is secured on the hose reel 11.

To mount the spray gun in the inoperative position, a recess 19 is placed in the top of the bolt 15 adjacent to the hinge 18. The spray gun can be hung in this recess 19 if necessary or removed from this recess again.

In Fig. 4 the paint spraying device 1 is shown from the opposite side. Evident is the hinge 18, which pivotally connects the latch with the housing 2, wherein the pivot axis perpendicular to the device standing on the ground and thus runs tangentially to the hose reel.

4 also show rollers 21 to 23, which are integrated into the housing 2, wherein two rollers 21, 22 are inserted in each case a foot 8, and the third roller 23 adjacent to the top or the handle 13 in the Side wall of the housing 2. Conveniently, all three rollers 21 to 23 lie in a common plane, such that the rollers rest together on the ground when the paint spraying device 1 rests with its side wall on the floor. In addition, the two rollers 21 and 22 inserted into the feet 8 permit a rolling movement of the paint spraying apparatus 1 in the upright position of the apparatus, as shown in FIG.

As shown in Fig. 5, the hose reel 11 and the cable drum 12 are parallel and coaxial with each other and are separated from each other by the partition wall 13, which is the winding portion IIa or 20a of each drum 11 or 20 directly limited. On the side facing away from the partition 12 axially facing the hose drum 11 has a boundary wall 14, a corresponding boundary wall 15 is provided on the cable drum 20 at a distance from the partition wall 12. The axial width of the

Winding areas IIa, 20a differs, the winding area IIa of the hose reel 11 is about two to three times as wide as the winding area 20a of the cable drum 20, which receives the power cord 24 for the electric drive unit. The diameter of the winding area IIa of the hose reel 11 is also greater than the diameter of the winding area 20a of the cable drum 20. The boundary walls 14 and 15 of hose reel 11 and cable drum 20 project beyond the respective winding area, wherein the diameter of the boundary wall 15 of the cable drum 20 slightly larger is the diameter of the winding area IIa of the hose reel 11.

As can be seen in conjunction with FIG. 6 in FIG. 5, an L-shaped connecting piece 26 is formed on the winding region of the hose reel 11, which is used to connect the hose reel

Hose over the coupling part 4 is used. The connecting piece 26 has two legs which are connected to one another at an angle of 90 ° and are connected in one piece, wherein a first leg leads radially into the housing interior and is acted on by the air flow of the electrical pressure generating unit 27 (FIG. 6) and the second leg is tangential to the second leg Hose drum 11 extends and is used to connect the air hose. Shown in FIGS. 5 and 6 are two connecting pieces 26 in the lower area adjacent to the feet 8 and the diametrically opposite area adjacent to the handle 13, which, however, are provided as an alternative and merely intended to demonstrate that the connecting piece is seen over the circumference of the hose reel can be arranged at different positions.

Fig. 7 shows a sectional view of a bearing for receiving a roller 23 in the housing of the paint spraying device. In a housing wall 28 of the housing is a part-spherical recess 29 for receiving the roller 23 is introduced, wherein instead of a part-spherical recess and other diametrics come into consideration for the recess. The inserted roller 23 is held by a holding plate 30 in the recess 29, wherein the holding plate 30 is provided with a recess through which a part of the roller 23 passes and the recess in the holding plate is surrounded by delimiting lips 31. The lips 31 allow a low-friction rolling of the rolling element or the roller 23. The holding plate 30 is connected to the housing wall 28.

Claims

claims

1. Transportable paint spraying device, with a in a housing (2) arranged electrical pressure generating unit (27) for

Generation of an air stream, which can be introduced into an air hose (3) which can be coupled to the housing (2), to which an injection unit (6) can be connected, characterized in that on the outside of the housing (2) a cable drum (20) for a Power cable (24) of the electric pressure generating unit (27) and a hose reel (11) for the air hose (3) are arranged, wherein the cable drum (20) and the hose reel (11) are arranged parallel to each other and via a radial partition wall (12) from each other are separated.

2. paint spraying device according to claim 1, characterized in that the cable drum (20) is formed integrally with the housing (2).

3. paint spraying device according to claim 1 or 2, characterized in that the hose drum (11) is formed integrally with the housing (2).

4. paint spraying device according to one of claims 1 to 3, characterized in that the partition (12) is formed integrally with the housing (2).

5. paint spraying device according to one of claims 1 to 4, characterized in that the dividing wall (12) projects radially beyond the hose reel (11) and the cable drum (20).

6. paint spraying device according to one of claims 1 to 5, characterized in that the hose reel (11) and the cable drum (20) each one to the partition wall (12) spaced, radially have the winding region (IIa, 20a) on each drum superior boundary wall (25).

7. paint spraying device according to one of claims 1 to 6, characterized in that the hose reel (11) and the cable drum (20) are arranged coaxially with each other.

8. paint spraying device according to one of claims 1 to 7, characterized in that the hose reel (11) is rotatably mounted in the housing (2).

9. paint spraying device according to claim 8, characterized in that the hose reel (11) is provided with an automatic winding device.

10. paint spraying device according to one of claims 1 to 9, characterized in that on the partition wall (12) has a handle (13) is formed.

11. paint spraying device according to one of claims 1 to 10, characterized in that on the circumference of the cable drum (20) a connecting piece (26) for connection of the air hose (3) is arranged.

12. paint spraying device according to claim 11, characterized in that the connecting piece (26) is L-shaped and a radially in the housing (2) leading leg and a tangential to the winding region (IIa, 20a) extending legs for connecting the air hose (3 ) having.

13. paint spraying device, in particular according to one of claims 1 to 12, with a in a housing (2) arranged electrical pressure generating unit (27) for generating an air flow, which can be introduced into a to the housing (2) couplable air hose (3) an injection unit (6) can be connected, characterized in that on the housing (2) one of the cable drum (20) associated latch (15) is adjustably arranged, which is to be adjusted between a locking position and an open position, wherein in the locking position of the latch (15) the winding portion (20 a) of the cable drum (20) at least partially spanned.

14. paint spraying device according to claim 13, characterized in that the bolt (15) via a hinge (18) rotatably on the housing (2), preferably on the partition wall (12) is held.

15. paint spraying device according to claim 13 or 14, characterized in that the bolt (15) has a receiving device for receiving the injection unit.

16. paint spraying device according to claim 15, characterized in that the receiving device is formed as a recess in the bolt (15) for suspending the injection unit.

17. Paint spraying device according to one of claims 13 to 16, characterized in that the bolt (15) is U-shaped, wherein the free end face of the bolt (15) in the locking position in an associated recess (17) in the housing (2). intervenes.

18. Paint spraying device according to one of claims 1 to 17, characterized in that the housing (2) has the following dimensions: height: width: depth = 1: 1: max. 0.5.

19. paint spraying device according to one of claims 1 to 18, characterized in that rollers (21, 22, 23) on the housing (2) are arranged.

20. paint spraying device according to claim 19, characterized in that the rollers (21, 22, 23) lie in a common plane.

21. Paint spraying device according to claim 19 or 20, characterized in that the rollers (21, 22, 23) are received in roller receptacles, which are introduced into the housing (2).

22. paint spraying device according to claim 19 or 21, characterized in that at least one roller (21, 22, 23) is positioned on a side wall of the housing (2).